Some breeds are almost outside of homogeneity and common origin criteria, based on a desire to organize the breeding of a species. This is the case of certain breeds of cows that have been "created" by merging several local races, or the horse and told Saddle French Saddle Pony, for which permits limited background and crosses but heterogeneous (TICA ragdoll breeders).
These breeds are formed with use objectives, production, and to collect and identify a type of animal. They can be called later be "closed" to new contributions or instead be constantly fed with products of first generation crosses of other races, as is the case of saddle ponies from pony breeds and arabian.
This article relates more particularly to use of word "race" to refer to groups of same species. Botanical nomenclature and mycological hence the term "race" is not a codified taxonomic rank, we speak of variety. It remains possible to use the word "animal variety" 4 to designate a selected domestic animal population consists of a fraction of animals of a species that special treatment selection have resulted distinguished from other animals of case by a small number of characters whose enumeration defines the model.
Drafting laws of heredity based on the work of Gregor Mendel used to connect a breed with a particular genotype. To understand this relationship, it is necessary to distinguish two notions: observable characters (the individual's phenotype) and the information carried by the genome (genotype of individual).
The word "race" refers primarily domesticated species. It refers to individualized populations of same species with distinct morphological and physiological hereditary other populations, that is to say, having an individual genotype means that man has tried to maintain some long time, but that it can evolve to economic imperatives or fashion.
These subdivisions are quite risky and complex; it is not uncommon to see them challenged on the basis of greater or lesser importance given to a discriminating character. In addition, the interfertility for cross breeding between the two subspecies, the choice to classify an individual in a particular group can be completely arbitrary.
For animal species used in breeding or plant species cultivated for food, industrial, ornamental, the selection pressure exerted by the man leads to greater homogeneity (relative to genes governing the desired phenotypes) of population and correspondingly to a loss of genetic diversity, which weakens vis-a-vis population aggression of any kind, such as disease. Commercial requirements lead to many standard set of breeds or varieties corresponding to different needs; well, animals or plants which do not correspond to standard of a race (or variety) are not involved in reproduction. The microorganisms used in industry have also been long since similar selections (eg yeast).
Recently, genetic engineering to modify the genes from one species to create genetically modified or transgenic species, including the new properties that meet the needs of those who exploit them. In classification of living things, the species (that is to say, a set of individuals generally interbreeding) is the last subdivision (or taxon) unanimously accepted.
These breeds are formed with use objectives, production, and to collect and identify a type of animal. They can be called later be "closed" to new contributions or instead be constantly fed with products of first generation crosses of other races, as is the case of saddle ponies from pony breeds and arabian.
This article relates more particularly to use of word "race" to refer to groups of same species. Botanical nomenclature and mycological hence the term "race" is not a codified taxonomic rank, we speak of variety. It remains possible to use the word "animal variety" 4 to designate a selected domestic animal population consists of a fraction of animals of a species that special treatment selection have resulted distinguished from other animals of case by a small number of characters whose enumeration defines the model.
Drafting laws of heredity based on the work of Gregor Mendel used to connect a breed with a particular genotype. To understand this relationship, it is necessary to distinguish two notions: observable characters (the individual's phenotype) and the information carried by the genome (genotype of individual).
The word "race" refers primarily domesticated species. It refers to individualized populations of same species with distinct morphological and physiological hereditary other populations, that is to say, having an individual genotype means that man has tried to maintain some long time, but that it can evolve to economic imperatives or fashion.
These subdivisions are quite risky and complex; it is not uncommon to see them challenged on the basis of greater or lesser importance given to a discriminating character. In addition, the interfertility for cross breeding between the two subspecies, the choice to classify an individual in a particular group can be completely arbitrary.
For animal species used in breeding or plant species cultivated for food, industrial, ornamental, the selection pressure exerted by the man leads to greater homogeneity (relative to genes governing the desired phenotypes) of population and correspondingly to a loss of genetic diversity, which weakens vis-a-vis population aggression of any kind, such as disease. Commercial requirements lead to many standard set of breeds or varieties corresponding to different needs; well, animals or plants which do not correspond to standard of a race (or variety) are not involved in reproduction. The microorganisms used in industry have also been long since similar selections (eg yeast).
Recently, genetic engineering to modify the genes from one species to create genetically modified or transgenic species, including the new properties that meet the needs of those who exploit them. In classification of living things, the species (that is to say, a set of individuals generally interbreeding) is the last subdivision (or taxon) unanimously accepted.
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